Theme Plus Issue 2.1 28/06/01 Page 2 of 12
Preparation
Before installation
Ensure that the local distribution conditions (identification of the type of gas and pressure) and
the adjustment of the appliance are compatible. Refer to burner data badge plate.
All types of flue
Ensure that:
• It only serves one fireplace
• Any terminal or cowl fitted is approved for use with this type of appliance.
• It is clear of any obstruction and any damper or restrictor is removed or fixed
permanently in the fully open position.
• Any chimney used for an appliance burning a fuel other than gas must be thoroughly
swept before installing any gas appliances.
• With an L.P.G. (propane) fire, any air supply entering the fireplace below floor level is
completely sealed off.
• The chimney is properly sealed so that the combustion products do not come into
contact with combustible materials outside the chimney.
• The base of the chimney is clear of loose debris, bricking up, etc.
Check with a smoke match that there is a positive updraught present. If a terminal is fitted
check that it is free from obstruction and does not restrict the exit and safe dispersal of
combustion products.
Location
This appliance is not suitable for installation in a room containing a bath or shower.
The THEME PLUS may be installed to any of the following:
• A masonry chimney with a minimum cross sectional area of 24,000 sq.mm, lined flue
with a minimum dimension of 100mm or a minimum diameter of 175mm and a
minimum effective height of 3m and having a throat forming lintel conforming to
BS1251. The appliance may be installed either: (a) without removing the chairbrick
but the spacer frame MUST be used, (see Fig. 2a for minimum depth
requirements), or (b) in a builder's opening with sufficient volume for debris collection
conforming to Fig. 2b.
• A pre-cast block flue conforming to the requirements of BS1289 with a minimum
cross sectional area of 16,500 sq.mm and a minimum dimension of 90mm. The
appliance may be used with the spacing frame described above if it desired to fit a
shallow mantel. See Figs 2c and 2d for minimum depth requirements. Ensure that
mortar fangs between the blocks do not protrude into the flueway. It is essential that
the flue terminal does not restrict the flue flow and complies with BS1289; if not,
replace with an approved terminal.
• An insulated twin walled metal fluebox and flue system with a minimum diameter of
125mm, and minimum effective height of 3m. The system must conform to the
constructional requirements of BS715 and Fig. 4.
The different types of installation are fully described in the next section.
The appliance must only be installed into an opening against a non-combustible wall.
Clearances
If a shelf is to be fitted above the fire, perhaps as part of a surround, it must be positioned a
minimum of 1m (39in.) above the top of the hearth, and project no more than 200mm (8in.)
from the front plane of the opening. Combustible material such as wood may be fitted to within
100mm (4in.) of either side of the opening so long as it projects no more than 100mm (4in.)
from the front plane of the opening.
Soft furnishings, decorations and some wall coverings may discolour or scorch if positioned too
close to the fire
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